Damper for stovepipes, furnaces, smoke-stacks, chimneys, and the like.



G.BBRGLER. DAMPER FOR STOVEPIPES, FURNACES, SMOKE STAGKS, GHIMNEYS, AND THE LIKE.

- APPLICATION lI-LED MAR. 21, 1910.

Patented Mar. 28, 1911.

qwi/tweooeo attormqo cHAnLEs sERGLER, or PORTLAND, OREGON.

DAMPER FOR s'rovEPIrEs, runnacnsf sMoK'E-s'rAcKs, CHIMNEYS, AND THE LIKE To all whom it may concern:

Be it known thatl, CHARLES BERGLER, a citizen of the United States, residing at Portland, in the county of ultnomah, and State of Oregon, haveinvented certain new and useful Improvements in- Dampers for Stovepipes, Furnaces, Smoke-Stacks, Chimneys, and the Like; and do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which appertains to make and use the same.

. of Fig. 2,

This invention relates to improvements in dampers for stove pipes, furnacesfsmoke stacks, chimneys and the like.

One object of the inventionfis to provide a damper adapted to be automatically op-' erated by the pressure of the draft passing through the pipe, stack or. chimney.

Another'object is to provide a damper havingmeans whereby the same may be held in an inoperative'position. i

With the foregoing and other objects in view, the invention consists of certain novel features of construction, combination and arrangement of parts, as will be more fully described and particularly pointed out in the appended claims. In the accompanying drawings, Figure 1 is .aside view of .a section of stove pipe showing the invention applied thereto; Fig. 2 is a central vertical section of the same; Fig. 3 is a similar view on the line 33 looking in, the'direction ofthe arrow; Fig. 4: is a view similar to Fig. 2 showing the damper in an inoperative position; Fig. 5 is a plan view of the damper removed from the pipe.

Referring more particularly to the drawings, 1 denotes 'the damper which is of suitable size and shape'to fit the pipe or opening to which it is to be applied, said damper being here shown as of circular shape and having formed therein a series of corrugations whereby the strength and durability of thedamper are greatly increased. Thedamper plate 1 is fixedly secured in any suitable manner to an operating shaft 2, said (shaft being arranged to one side of the center of the damper as shown, whereby whenthe ends of the shaft are engaged with the'pipe to hold the damper in position, the. larger side of the damper will have a tendency to swing downwardly by reason of its greater weight thereby opening the same; eThe narrower side of the damper is preferably bent Specification of Letters Patent.

Patented'Mar. 28, 1911.

Application filed March 21, 1910. Serial No. 550,705.

upwardly, as shown at 3, and insaid narrow upwardly bent portion is formed a series of holes or vent passages 4. The purpose of said passages and the upward bending of this portion of the damper will be'hereinafter more fully described 7 In one end of the shaft is formed a loop 5, With one side of which is pivotally connected a weight supporting arm 6 on which is adjustably secured a counterbalancing wveight 7 said weight being preferably held in its adjusted position byfa set screw 8.

The inner end of the arm 6 is connected to one side of the loop 5, preferably .by bending u or coiling the arm around said side of the loop and continuing the coiled end of the arm to form a stop finger 9 which projects across the loop and engages the opposite side thereof, whereby the weighted arm 6 is held in operative engagement with the shaft of the damper. By connecting the weighted arm of the shaft of the damper in the manner described, the weight'will tend to hold the lower portion of the damper swung up part way or past the vertical plane of'the' shaft, so that the draft in passing through the pipe may-engage the lower portion of the damper and thus swingthe same upwardly to a greater or less extent according to the amount of draft passing through the pipe. By adjusting-the weight 7 on the arm 6, the amount of resistance offered to the draft by the damper plate may be regulated.

It will be notedthat when the damper is in its normal open position, the curved upper portion thereof will be practically perpendicular and will offer no resistance to i the draft passing through the pipe until the damper begins to close and, by providing the passages 4 in this curved portion .of the damper, this resistance is decreased to a minimum after the damper is closed. The. holes or passages 4 also serve to permit the escape of gases which .may accumulate in the stove orpipe after the damper is closed.

.W'hen it is desired to throw. the damper out of operation, the weighted arm 6 is swung around on its pivotal connection with the loopedend of the shaft 2'until said arm and weight hang down .in perpendicular position, in which position the weighted arm will hold the lower portion ofthe damper also in vertical or perpendicular position, thus permitting the draft vto 'readily pass through the pipe on opposite sides of the damper. By means of the pivotal connechas been swung to a closed position by the:

pressure of the draft.

From the foregoing description taken in connection with the accompanying drawings, the construction and operation of the invention will be readily understood without requiring a more extended explanation Various changes inthe form, proportion and the minor details of construction'may be resorted to without departing from the principle or sacrificing any of the advantages of this invention as defined in the appended claims.

Having thus described my invention, what I claim is 1. In a damper of the character described, a plate, a supporting shaft secured to said plate to one side of the center thereof, a loop formed in one end of said shaft, a weighted arm pivotally engaged with one side of said loop, a finger formed on the pivoted nected with the shaft to hold the damper in I a partly opened position and whereby said arm may be swung around on its pivotal connection with the loop the damper being held by the force of gravity in an open 1n-' operative position, and a weight adjnstably secured to said arm.

2. In a damper ofthe class described, a plate, a supporting shaft secured on said plate to one side of the center thereof, a loop on one end of said shaft, an arm having one end wound around one side of said loop to form a pivotal connection therewith with its terminal extended to form a finger to engage the other side of said loop to hold said arm in operative position to support the damper in partly open position, and a' weight adjustably mounted on said arm In testimony whereof I have hereunto set my hand infpresence of two subscribing witnesses.

CHARLES BERGLER.

Witnesses:

WM. 0 BnNBow, C. A. BENBOW. 

